Setting tool for lead cinch anchors



April 2, 1963 B. M. MILLER 3,083,855

SETTING TOOL FOR LEAD CINCH ANCHORS Filed Aug. 4, 1961 JNVENTOR.

BILLY M. MILLER ATTORNEY Unite rates Patent 3,083,355 SETTENG TGOL F011 LEAD ClNCH ANCHORS Billy M. Miller, Washington St, Oswego, Ill. Fiied Aug. 4, 1961, Ser. No. 129,312 Claims. ((31. 1218-36) This invention relates to improvements in apparatus for use in the positioning and setting of internally threaded lead cinch screw anchors of the type illustrated in the Ackerman and Johnson US. Patent 1,177,843, issued April 4, 1916. In industry, these anchors are still known commonly as Ackerman-Iohnson anchors.

Heretofore, according to conventional practice, such an anchor has usually been inserted into a previously drilled hole to the full depth of the hole, so that when force is applied to the end of the lead sleeve to cause it to slide along the rigid body of the anchor, the latter may remain immovable while the sleeve slides on it and expands.

Such practice requires that the hole be drilled to a properly measured depth so that the anchor may be finally set at a desired position relatively to the wall surface.

Prevalent extensive use of hollow concrete blocks presents special and additional problems in the foregoing use of these anchors. Too often, a hole drilled for an an chor will extend into a cast hole in the block, and then there is no immovable support for the base of the anchor.

One of the objects of my invention is to provide an apparatus for positively holding an anchor of the above type at a selected position independently of the depth of the hole, while the lead sleeve is being expanded.

Another object of the invention is to provide in such apparatus a manually reciprocable hammer and a guide therefor.

Another object is to provide apparatus facilitating rapid and accurate setting of the anchors, and adaptable to use with anchors of various dimensions.

Another object of the invention is to provide an anchor setting apparatus including a rigid portable frame to be positioned on the wall surface adjoining the hole in which an anchor is to be set, the frame serving as part of the support for the anchor while the latter is being set, and, further, being part of the support for a reciprocable hammer which thus may be employed to set the anchor without resort to any other tools.

Another object of the invention is to provide an anchor setting device so designed that the operator may readily adjust the anchor longitudinally in a drilled hole before setting it.

Other objects and advantages of the invention will be mentioned hereinafter, or will become apparent in the following specification.

In the drawing, FIGURE 1 is a perspective View of a preferred form of the apparatus of my invention.

FIGURE 2 is a side elevation, partly in section, showing the device secured to an anchor, ready to set it.

FIGURE 3 is a sectional view, on an enlarged scale, of a conventional Ackerman-Johnson lead cinch screw anchor.

Referring further to the drawing, the apparatus includes a rigid frame consisting of a base 11, which may have an annular or other suitable shape, providing a firm support for the rigid legs 12 and 13 secured thereto perpendicularly in any suitable manner. The legs are connected at their outer ends by a cross bar 14.

A cylindrical hammer 15 is reciprocably mounted for sliding movement on a guide rod 16, the outer end of the rod extending through an unthreaded hole in the cross bar and being itself threaded to receive the wing nut 17.

The other end of the rod is threaded for engagement With a conventional Ackerman-Iohnson type of screw anchor, having a bell-shaped bottom A, an internally threaded shank B, and a ductile sleeve C usually made of a leadcontaining composition.

The hammer 15 is longitudinally bored throughout its main body portion 18 to slide freely but not too loosely on rod 16. Its collar portion 19 has a larger bore, large enough to embrace the shank B, while being hammered down on the lead sleeve C to slide the latter along the shank B until the sleeve is expanded enough to set the anchor immovably in a previously prepared hole. Such a hole is indicated in the concrete wall D at E. Normally, only a few manually propelled strokes of the hammer will set the anchor firmly and accurately in the hole.

The parts 11, 12, 13 and 14 constitute a frame for rigidly supporting the guide rod, and with the rod form a support of ample stability for accurately guiding the hammer when the latter is being employed to set the anchor in the wall. In order that the rod be not displaced longitudinally by frictional contact wtih the reciprocating hammer, it is preferred that a shoulder be formed on rod 16 at 20 to abut the inner surface of the cross bar 14, the outer end 21 of the rod, for this purpose, being reduced to a lesser diameter beyond the shoulder and being threaded. Thus, when the wing nut is tightened, the rod may not move longitudinally and will supoprt the anchor at the desired position while the latter is being expanded. During this operation the frame is manually pressed firmly against the wall, at least until the anchor is sufiiciently set to support the entire assembly.

Lead cinch anchors of various outside diameters and various internally threaded diameters are required by industry and are available. Accordingly, each rod such as .16 for use with these anchors should have such a diameter below the cross bar 14 that its lower threaded end 22 may be threaded into the particular anchor being used. It is preferred that there be a rod 16 provided for each different size of anchor. Also, the hammer to be used in each such case should be of an appropriate size, bored to slide accurately on each such rod, and having an impact collar 19 of such dimensions as to register effectively with the lead sleeve of each such anchor. However, all such rods may have their end portions 21 of the same diameter to fit the hole in cross bar 14 and be threaded to receive the sme wing nut 17. Accordingly, one frame should sufiice to be used in the setting of various conventional anchors of different diameters.

By varying the extent of threaded engagement of a rod 16 with a screw anchor, one can predetermine the eventual set position of the anchor relatively to the face of the Wall.

Should a hole be drilled deeper than necessary to receive a particular anchor or accidentally penetrate a cast hole in a hollow concrete block, this apparatus will hold the anchor at a selected position while it is being set. The frame and rod 16 will assure that when an anchor is being set its longitudinal axis will remain perpendicular to the wall face.

After an anchor has been set with the aid of this apparatus, the rod 16 may be unscrewed from the anchor, and the frame and rod may then be removed for other use.

While a preferred embodiment of the invention is shown and described herein, it should be understood that the invention is not limited thereto, and that modifications of the invention and variations thereof may be devised and employed without departing from the spirit and scope of the invention disclosed herein and defined in the appended claims.

Having shown and described my invention, I claim:

1. Apparatus for setting lead-sleeved screw anchors comprising a base member adapted for contact positioning upon a body surface adjacent an anchor hole in the body, a rigid frame including portions secured to the base and extending generally normal thereto, a rod having a threaded end portion for engagement with internal threads of the anchor adapted for supporting the anchor within said hole, means for detachably securing the other end portion of the rod' to the frame at a position remote from said. base adapted for. holding the rod normal to the base, and a hammer slidably mounted on said rod having an annular impact collar extending from an end thereof shaped for registration with the end of the lead sleeve of theanc o 2 Apparatus for setting lead-sleeved screw anchors comprising a base member adapted for contact positioningupon a body surface adjacent an anchor hole in the body, a rigid frame including a pair of legs secured to the base and" extending generally normal thereto and a cross bar connecting said legs remotely from the base, a rod having a threaded end portion for engagement with. the internal threads of the anchor adapted for supporting the anchor within the hole, means for detachably securing the other end portion of the rod to the cross bar remotely from 11?. base adapted for holding the rod. normal to the base, and a hammer slidahly mounted on said rod having an annular impact collar extending from an end thereof shaped for registration with. the end of the lead sleeve of t e nchor,-

3, In an apparatus for setting lead-sleeved screw anchors, a rod having a threaded first end portion adapted for engagement with the internal threads of the. anchor for supporting the anchor axially immovably in a drilled hole in whichit is to be set, a rigid frame having a base portion adapted for contact placement against the surface o a wall n wh c -sai ri led ho e s oca v a having a rod supporting member spaced from and connected to said base, means for detachably securing a second end portion of therod to said member, and a hammer reciprocable freely on said rod between said member and the anchor having an annular impact extension onone end shaped for registration with the end of the lead sleeve of the anchor.

4. In an apparatus for setting lead-sleeved screw anchors, a rod having a threaded first end adapted for engagement with the internal threads of the screw anchor, a hammer mounted on the rod for free slidable manual reciprocation and having an. annular impact extension on one end shaped for registration with the end of the lead sleeve of the anchor, a rigid frame secured to the other end of the rod remotely from said first end and having a base portion adapted for contactwith the planar surface of a body having an anchor hole therein, said frame androd being proportioned and adapted for supporting in said hole an anchor threadedly engaged with the first end of the rod for holding the anchor in the hole ata selected predetermined position independently of the depth of the hole, whereby the hammer may be manually re ciprocated to expand the sleeve to set the anchor in the hole at said position.

5. In an apparatus for setting lead-sleeved screw an chors, a rod having a threaded first end adapted for engagement with the-internal threads of the screw anchor, a hammer mounted onthe rod for free slidable manual reciprocation and having an annular impact extension on one end shaped for registration with the end of the lead sleeve of the anchor, and means for holding the rod and an anchor threaded thereon axially immovably withina previously drilled hole into Whichthe 'anchor'is inserted, whereby reciprocation of the hammer into contact with the anchor sleeve may set the anchor without moving it axially.

No references cited. 

5. IN AN APPARATUS FOR SETTING LEAD-SLEEVED SCREW ANCHORS, A ROD HAVING A THREADED FIRST END ADAPTED FOR ENGAGEMENT WITH THE INTERNAL THREADS OF THE SCREW ANCHOR, A HAMMER MOUNTED ON THE ROD FOR FREE SLIDABLE MANUAL RECIPROCATION AND HAVING AN ANNULAR IMPACT EXTENSION ON ONE END SHAPED FOR REGISTRATION WITH THE END OF THE LEAD SLEEVE OF THE ANCHOR, AND MEANS FOR HOLDING THE ROD AND AN ANCHOR THREADED THEREON AXIALLY IMMOVABLY WITHIN A PREVIOUSLY DRILLED HOLE INTO WHICH THE ANCHOR IS INSERTED, WHEREBY RECIPROCATION OF THE HAMMER INTO CONTACT WITH THE ANCHOR SLEEVE MAY SET THE ANCHOR WITHOUT MOVING IT AXIALLY. 